Waterproof sheet material



Dec. 18, 1934. E. H. ANGIER WATERPROOF SHEET MATERIAL OrginaLFled Nov. 29, 1930 mmf QN k v Iii/vena? EdwardHuflngi/'e retain its UNITED STATES yPATEN'I OFFICE WATERPROOF SHEET This invention relates EdwardlLAngier.

toEdwardRAng'ler, Maas.

Original appli FraminghmMa-nsignor as trustee,

cation November 29, 1930, Serial No. Divided and this application December'zs, 1931, sei-ua No. 583,621

s claim. (ci. 154-50) to waterproof sheet material. A cardinal object of the invention is to provide a strong-bodied paper.

for use as a building paper,

efiieiency under varied conditions of example,

Niy invention will be well ence to the following description of adaptable, for which will understood by refertive embodiment thereof taken in connection with the accompanying drawing, wherein:-

Fig. 1 is a diagrammatic view of a process for producing a paper such tively.

In the preferred as referred to; and

fragmentary, diathe product at varias indicated by the sec- 4-4 of Fig. 1 respecform of the invention illustrated in the accompanying drawing I provide (see Fig. 4) an expansible paper consisting of two craped pregnated with may be black asphalt or terials or mixtures forming at each sheet an adsorbed,

paper, however,

touch; the two sheets 5 sheets 5 and water-resisting material which '7, each of which is imsimilar bituminous mathe outer face of substantially continuous the surface of the and 'I receiving between them a layer of water-proofing material 12, which layer may carry embedded in the body thereof strands 13, preferably reticulated into a fabric, which will serve to reinforce the assembly as a whole and also to position the intervening layer 11, as will appear as The construction of fully understood from tion. It will the description proceeds.

the paper will be more a descriptiony of Fig. 1 diagrammatically and a method of producthat the process need not be thus continuous and that various features illustrated may or cases. For instance, I have may not be used in all herein disclosed the sheets 5 and '7 in the completed product as being rendered expansible by purposes the product may be inexpansible paper.

Referring now to webs 5 and 'I of type, are led from over a coating roll amount of waterpmong as face thereof and the two hesive character such tuminous material to a of them are pressed tog craping but for certain made with plain Fig.i 1 of the drawing, two sheet material, which convenpaper of the kraft such as 5,

material of an adasphalt or other biether by squeeze rolls 1'? an illustra-V with the asphalt layer 20 between them, as illustrated in Fig. 2. This duplex assembly is in condition to be prepared for craping by being wetted in the water tank 21 and led over and pressed against the craping roll 23 to be crowded back on itself and craped by the doctor blade25 in well known manner. The duplex craped assembly may be then led through a heating chamber 27 which may fuse the intervening nlm 20 causing it to be absorbed in the adjacent faces of the webs 5 and '1, and the two craped webs mayv then be separated, as indicated in Fig. 1 at the right of the chamber 2'?. In Fig. 3 is shown diagrammatically one of the two resulting sheets. The face of this web 5 which formerly opposed the web 7 has absorbed into it a portion of the material 20, as indicated by the stippling 9, and the other web 'l has similarly absorbed into it a quantity of the coating material, as indicated by the stippling 11. I prefer so to control the amount of material 20 and the heating that the absorbed material only partly penetrates the webs as indicated in Fig. 3, and, while none of it remains to form a tacky sln'face on what in the finished product will be an exterior face, the material at 9 and 11 only supercially enters the body of the web and forms substantially a continuous nlm resisting penetration of moisture.

The uncoated faces of the webs 5 and '1 are then united with an intervening layer 12 of asphalt or the like between them, and I have herein shown them. as led down through the bite of a pair of rolls 29 between which rolls is maintained a pool 31 of iluid asphalt. From these rolls the two webs thus united and duplexed may be led through a pair of rolls 31 which are heated as indicated diagrammatically by the showing of the steam pipes 33, and the assembly thus heated sufiiciently to draw part of the intervening layer 12 into the body of the paper not previously impregnated with the material supplied from the layer 20 and now appearing in the form of the films 9 and 11. The amount of asphalt supplied is so generous and the heating is so carried on that the intervening layer 12 is not completely absorbed into the two sheets as is the layer 20 but remains as a substantial continuous layer between the two webs, as indicated in Fig. 4.

In Fig. 1 I have also illustrated diagrammatically an improved method of combining strand material 13 with a multi-ply paper. This strand material 13, which may'take the form of a loosely woven fabric such as burlap of about 1%" of V4" mesh, may be fed from a supply roll 37 through the pool 31 of impregnating material in such manner that the sheet of strands is impregnated and also picks up and carries with it a substantial layer of the molten material before contacting with the webs. 'Ihe reinforcing material 13 is preferably supplied slackly, as indicated diagrammatically in the figure by the showing of a drive 39 for roll 37.

When a reinforcement of strands is incorporated in a paper structure in the manner described, it is not merely pasted between the two webs or to their faces but, as illustrated in Fig. 4, is embedded in the layer 12 of waterproofing material. An important function of such a material under these circumstances is to position such a layer between the two webs 5 and 7 to resist displacement or flow thereof in such manner as might leave thin or bare spots between the two webs.

'I'he improved product shown is applicable to various uses. Among them may be mentioned, in the case where the webs 5 and I arepaper material of strong body, use as a building paper to be embodied in a building structure, as described in my application Serial No. 499,064, filed Nov. 29, 1930. In this case the webs 5 and 7 are preferably craped as shown so that the material may expand under the strains which the building undergoes after erection. The substantial layer of material 12 interposed between the webs serves to seal about the nails or similar fastenings by which the paper is secured in position in the structure. The product may also be used as a material for the manufacture of various articles of utility. The non-tacky surface permits the articles to be freely handled while they wear well and resist moisture which otherwise might tend to disintegrate them. The craped surface gives an attractive leather-like nish and the elasticity due to the craping permits ornamentation when desired, as, for instance, in the case of a portfolio, by vembossing which may be deep drawn without danger of tearing the material or impairing its waterproof character.

This application is a division of my application Serial No. 499,065, filed Nov. 29, 1930, in which I have claimed the method involved. I herein also disclose a method of uniting reinforcing strands with paper which is claimed in my copending application Serial No. 583,621, flled Dec. 29, 1931.

I am aware that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and I therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive; reference being had to 'the appended claims rather than to the foregoing description to indicate the scope of the invention.

I claim:

'1. A duplex waterproof paper having a nontacky surface and comprising a pair of sheets of the kraft type adhesively joined by an intervening film of water-resisting material, their outer faces having waterproofing material substantially completely absorbed therein, whereby a nontacky surface is provided, and presenting a continuous water-resisting superficial Surface.

2. A craped duplex waterproof paper having a non-tacky surface and comprising a pair of sheets of the kraft type adhesively joined by an interr vening film of water-resisting material, their outer faces having waterproofing material substantially completely absorbed therein, whereby a non-tacky surface is provided, and presenting a continuous water-resisting superficial surface.

3. A craped water-resisting paper consisting of a firmly felted resistant body having non-tacky surfaces and having absorbed superficially into'4 both faces thereof a substantially continuous fllm of fusible water-resisting material.

EDWARD H. ANGIER. 

